"Neptun" is a ready project of a single-family house, which is intended for semi-detached houses. We can implement it on a plot of medium width, the minimum dimensions of which for one half are 17.35 m x 25.15 m. The "Neptun" project is a two-story house, the advantage of which is the lack of slants on the first floor, which makes the rooms more functional. By choosing a two-story house, we can also get a larger living space on a relatively small plot of land. The project has a simple, compact body, typical for a two-story house. It will meet the requirements of a family of 5-7 people who value the most modern solutions. Covering the building with an envelope roof, subdued colors of the facade and finishing it with a board make the house look modern. The usable area of each half is 245.65 m2 and the building area is 196.6 m2. The author of the project included a double garage in the body of the building. A double garage will be an advantage for people using two cars. Entering the house, we enter the hall with a place for a recessed wardrobe in which we can leave outerwear. From here, we also have access to the garage, from which we will go to the boiler room. Behind the garage there is a bathroom with a laundry area. Then we have stairs leading to the first floor and behind them a study that can be rearranged into a guest room. The living room is connected to the kitchen, making the interior very spacious. The partially open kitchen includes a space for a small pantry, which will give us more options for storing food products. The bedroom area upstairs has four spacious bedrooms and a bathroom. The master bedroom includes its own bathroom and wardrobe, the next two include wardrobes and the last one is a recess for the wardrobe. In the Neptun project, the ridge is located parallel to the road. The implementation technology recommended by the architect is the brick technology ensuring the durability of the structure for many years.